Hydrocarbon fuel burning system



Jan. 15, 1935. F v, RISINGER 1,988,334

HYDROCARBON FUEL BURNING SYSTEM Filed May 51, 1930 wie gmc/nto@ Patented Jan. 15, 1935 UNITED STATES aairEtrrv OFFICE nvnaooAaBoN FUEL'BURNING SYSTEM Frank V. Risinger, Lakewood, Ohio Application May 31, 193e, seriaiNo. 458,327

' 2s claims. V(o1. 15s-53) This invention has-to do with the art of hydrocarbon burning apparatuses .and appliances, and involves ther apparatus or system, and a process, for burning in gaseous or vaporized condition, a

- liquid hydrocarbon mixed with air.

Perhaps the most available hydrocarbon at present on the market is gasolene, and it is highlyl desirable to produce, if possible, a burner appliance and method of burning a. hydrocarbonof this nature, for household, furnace, land any other uses required. It has been proposed to introduce into a hydrocarbon liquid ysuch as gasolene, different chemicals which Will reduce the possibility of condensation at or before it reaches the burner when the liquid fuel is vaporized and supplied to the burner for ignition.r So far as 1` am advised, it has not been proposed heretofore to vaporize and burn gasolene, or the like without, the use of such chemicals due to the fact that the vaporized hydrocarbon fluid supplied tothe burner condenses before it reaches theburner jets or openings. sate under the conditions stated creates all `sorts of difculties and prevents any efficient utilization of a burner for the liquid hydrocarbon vapor, so that those burners and methods of burning liquid hydrocarbon of the kind .mentioned that have been heretofore proposed,l have not proved practicable and efcient in action,

Now in the carrying out of my invention I propose to thoroughly atomize or carburet the liquid hydrocarbon, such as-gasolene, as a primary step of my method, mix this hydrocarbon with a much larger amount of air, proportionately speaking, then preheat the atomizedmixture of hydrocarbon and air, and supply the preheated mixture to the burner in such conditonso as to avoidv the possibility of any condensation of the atomized particles such as Will lcreate the diiiiculties here.- tofore eXperienced.-`

The method above set forth I carry out by an apparatus which involves suitable provisions for,`

properly atomizing the liquid hydrocarbon, these provisions preferably involving the preliminary atomizing of the hydrocarbon in the presence of The formation of the condenlforA delivery of vthe fuel with air tothef burner" d f liquidy supply' conduit: to the. auxiliary tanlgg the vaporous hydrocarbon and air mixture to the burner jets. Owingy to thefact that my` highly atomized-fuel comprising the hydrocarbon vapor and admiXed air is preheated-during 'the effective operation of my burner appliance, the combusti--T ble constituents of' the 'mixture are burned with a l,'substantially perfect. combustion effect, and it isA possible, by special formation of my burner means, to utilize the nal mixture; or fuel lfrom Which the combustion is produced, to heat the Bunsen tube incident to the burning of said fuel at the jet openings of the burner proper. Due to the fact that the. atomized hydrocarbon and air mixture supplied4 to the lBunsen tube which acts as a preheating means is in a finely divided, l highly' atomized condition and` containsa `substantial proportion of air as a part' of the mix-1 ture,fhigh` combustibility of 'the mixture exists and it maybe readily burned directly` from the burner jets and' ignited Without preheating-J- as an eiective immediately available combustible mixture, even though after the burning has started the burner jets are utilized to heat the; Bunsen tube` or preheating devices for the. purpose' of preventing condensation of the vapor in the fuel mixture.- i Y Another object of my invention is to provide a hydrocarbon fuel burning system in Whichis' utilized a closed hydrocarbon liquid fuel 'receptacle for supplying the atomized fuel to the burner together With air under pressure, said re- 'ceptacle being provided with means fo-rfimaintaining aconstantsupply of fuel therein, together With means for maintaining a-constantp'ressure 35 in a carbureted or atomized form-. l

A further object of my'inventionisto providey a fuel reservoir of comparatively' small' sizevvhichl may be convenientlylocated with respect tothe burner, said reservoir being provided vvithjmeansv for maintaining a constant liquid level! therein andA also being provided with means for maintain'- ing a constant supply of air under pressure on'y the fuel and to provide a' main reservoir or supply tank Which is connected to theflrst mentioned reservoir by air and liquidsupply pipes, the supeply tankbeing of greater capacitythan the reservoirand preferably Alocated in the basement :'or outside of the building in, a convenient kplace for fllingthe same:y with rthe hydrocarbon to ,bel burned in the burner.;` Also 'means' are contemf plated to supplyI air ,underv pressure tosaid supply tankf, said pressurebeing effective tomove the liquid` from thek supply tank throughy the liquid level determining means closing the air supply pipe until the predetermined level within `which is supplied from a main reservoir-,under air pressure as the fuel in its atomized form is being withdrawn from the auxiliary reservoir'.v

Other and further objects and advantages of the invention will become apparent as the description of the invention proceeds.

For a full and more complete understanding of the invention, reference may be had tothe fol'- lowing description and accompanying drawing, in

which Figure 1 is a View of my improved-hydrocarbon vapor burning system, parts being broken away and shown in section.

Figure 2 is a section on the line 2 2, of Figure- 1, looking in the direction, of the arrow.. y v

Figure 3 is an enlarged detail view of my carbureting and vaporizing device, and

Figure 4 isa sectional view through theconduit leading from the supplemental reservoir to the burner. f

Figure 5 is an enlarged detailview of my control valve associated with the atomizing device.

In the drawing A indicates vgenerally my improved hydrocarbon burner which is supplied with hydrocarbon fuel in a highly atomizedand carbureted state from my auxiliary carbureting supply receptacle B. l

The main supplyy tank indicated at C is preferably disposed exteriorly of the building in which the burner A and auxiliary receptacle `or reservoir B are located, the supply tank C being provided with the filling opening 1 having a suitable closure plug 2 and means for supplyingrair under pressure thereto through a pipe 3- consisting of a compressor 4 operated by any suitable power source such as a motor 5.A lAssociated with the compressor is a' pressure responsive controlling device 6 for'discontinuing the operation. of the motor andcompressor when the pressure within the system reaches a predetermined degree, and startingagain when the pressure goes' below aA predetermined degree.

Themain supply tank C has leading therefrom a `fuel delivery pipe 7 and an air delivery pipe 8. These-pipes communicate with the interior of the auxiliary receptacle B, the pipe 7 terminating at approximately the level of the liquid as indicated at;'7a in the receptacle B.'Y The pipe 8 is disposed centrally ofthe receptacle B and carries thereon a liquid controlled closure member or float actuated valve 9 which becomesoperative to close the end 8a of the pipe 8 when the liquid level drops belowv a predetermined point Within the receptacle at B.

Disposed within receptacle B which ispro-` vided with a plug -12 for cleaning, inspection, and

assembly purposes, arefuel carbiireting or atomhighly `atomzed form through the control valves manner;

11 which control the quantity of atomized fuel and air passing to the burner A through the conduits 13, the particular cross section of which is shown in Figure 4.

This fiat conduit 13 in its particular form prevents the change of the fuel from atomized to condensed state during its passage therethrough to the burner A.

The burner includes a valve 14 having a laterally extending' conduit 15 to which the conduit or pipe 13 is secured. The fuel in its atomlzed form is injected into the open ended heating pipe or Bunsen tube 16 whereupon as it passes therethrough is heated by the flames of the burner and further vaporized or expanded as it enters the gas chamber 17, whereupon it passes through the burner openings and is burned in the usual The valve 14 serves also as a supplementary atomizing means, maintaining the fuel in finely atomized condition in the jet of fuel which is injected into the tube 16. f

It should be observed that the atomized fuel as it is injected intothe end of the annular pipe 16 causes the necessary additional air for proper combustion of the fuel to be ysucked :in therewith, adjacent to the jet 14a.

In the operationV of the device, the plug 2 of the main supply tank C is removed and the tank lled with the necessary quantity of hydrocarbon,

whereupon theplug is replaced and the motor `cause a reduction of pressure within the auxiliary reservoir. i

Fuel will continue to flow through the pipe l until the level of the fuel rises to a point where the float control valve member 9 will be lifted. This action vents the pipe 8, permitting air under pressure from the supply tank C topass through the pipe 8 into the auxiliary reservoir 'B which will of course equalize the pressure between the reservoir and the receptacle, causing anyl liquid above the level as indicated bythe end 7a of the pipe 7 to return through this pipe to the main supply tank. f j

When the level drops sufficiently within the receptacle B, the float valve member 9`will again close the end 8a of the pipe 8, causing a reduction of pressure between thek receptacle and tank whereupon the higher pressure in the tank' will again force the liquid upwardly through the pipe 7 until the level is again established.

The carbureting device or atomizer 10 consists of a U-shaped pipe lahaving one end in communication with the control valve l1 and the `other end disposed above the level of the liquid within the receptacle B causes air to flow through the open end Y10b downwardly pastk the opening l-Gc, and upwardly into `the control `valve 11.

Pressure on the liquidwithin the tank B also causesv a certain amount of the liquid to pass into the opening 10c, butdue to the relatively minute size o-f this opening, the liquid is completely atomized kby the air passing through the pipe before it reaches the valve 1l. The valve` 11 igesassa risprovided with 'an auxiliary air 'supply control -Valve 11a for admitting additional air under pressure vfrom the receptacle B into the vaporous vmixture .aslitis conveyed from the valve through the conduit 13 through the burner A.

In hydrocarbon burning systems it haslbeen lheretofore proposed to convey the fuel in a v yliquidistate to the burner Whereuponit is intro- 'duced into a generator tube which must bemainftained "heated to a comparatively high degree in order to vaporize the fuelbeforeit enters the burner.. This construction usually necessitates 'the preheating of the generator tube which positively prevents immediate ignition and positive control of the vaporized fuel as it enters the burner.

In my improvedapparatus I am able toy completely atomize the fuel without the necessity Aof the preheating above referred to and convey 4the fuelito the burner in this highly atomized icondition whereby itmay be immediately ignited 'and thus readily employed for burner-starting purposes, even though subsequently it may be yheated additionally toincrease its eiiicient nnely divided condition inl which it will be burned during continuous use of the burner.

Means are also provdedfor regulating the flow of the atomized fuel to the burner whereby the flame may be controlled as desired. v

With my apparatus I obtain a most flexible control of the richness of the ultimate gas generated from such liquid hydrocarbons as gasoline, for Which'my invention has especially been designed. Thus I effect preliminary automatic 'admixture of air from the main liquid fuel supply tank with the rich fuel in the auxiliary `fuel reservoir, a supplemental mixture of air under manipulatable control with the vaporized fuel produced in the auxiliary reservoir, and further additional admixture of atmospheric air 'with fuel quantity control, with the already highly vaporized fuel, at the location of the .jet or jets 14a from Which the highly atomized fuel is injected into the heating or Bunsen pipe 16. The

nicety of control thus .obtained makes for the generation of a pure fuel vapor direct fromliquid fuel, such as gasoline, in a manner not heretofore secured so far as I am at present advised. The disadvantages of being required to burn a poorly developedand largely moist fuel gas so generally produced by burning apparatus of the type of this invention, are thus largely obviated, along With carbon troubles and 'consequentiineiciency Having thus described lmy invention, what I claim asnew and kdesire to secure byrLetters Pat- `ent of the United States, is-

' l. In a hydrocarbon burning apparatus of the `class described, a hydrocarbon burner, a main fuel and air supply, an auxiliary fuel and air supply, means .for supplying air and fuel from said `main supply to sai'dauxiliary supply instrumentalities in the auxiliary supply for converting the Afuel linto Va mist-like condition, means for supplying 'fuel and air in the mist-like condition from said auxiliary supply to lsaid burner under `pressure, andmeans in the auxiliary supplyV for varying the ratio `of air and fuel supplied by the last named means, the fuel being burnable Without ,preheating kkliquid vconduits establishing communication between said tank and receptacle for supplying air dand liquid fuel to said receptacle under pressure,

a valve member associated with said air pipe to render the pressure Within the tank effective yto move the liquid from the tank to the receptacle upon a reduction of the quantity of fuel in the al air from the receptacle tosaid atomized fuel l.

'mixture l3. In arhydrocarbon conditioning and burning apparatusof the class described, a'hydrocarbon y burner, a `main fuel and air supply, an auxiliary 'fuel and air supply, means for supplying air and vfuel from said main supply to said auxiliary supply, means in the auxiliary supply for converting fuel therein into a mist-like condition, means for continuously supplying fuel and air under substantially constantpressure and in the mist-like condition from said auxiliary supply to said burning apparatus for as long as a iiame continues at said burner, and instrumentalities in the auxiliary supply for adjusting the amount of air admitted to the fuel.

4. A hydrocarbonconditioning and burning apparatus of the class described,comprising, in combination, a burner structure, a liquid hydrocarbon fuel supply associated with said burner, at- `omizing means within said supply to convert the hydrocarbon into a mist-like condition, means 'for supplying the mist-like hydrocarbon together with air to the said burner structure in mist-like condition, the burner structure comprising a'burner and a Bunsen tube associatedwith the burner and interposed'between the atomizing means and the burner to receive `the fuel in mist-like form, the burner being adapted to burn kthe resulting --hydrocarbon mixture Without preheating, while the burner yWhen started preheats further quanf tities of the mist-like hydrocarbon in the said ,'Bunsen vtube above its condensation point ybefore it is burned by the burner and after it leaves the atomizing means. 1

5. In a hydrocarbon conditioning and burning 1 apparatus ofthe class described, a burner structure, a liquid fuel supply, carbureting means associated with said supply and said burner yfor converting the'fuel into a mist-like condition, means for supplying air under pressure to said carburet` ing means, the said burner structure comprising a burner, a Bunsen tube associated with the burner and continuously receiving mist-like fuel yfrom the said supply, and a needle valve for con- `trolling the supply of carburetted and mist-'like fuel to the'burner structure and for further car- -bureting the fuel, the burner being adapted to initially burn the carburetted Afuel Without pre'- lheating the same, although the said Bunsen tube is positioned intermediate the carbureting means yand the burner, the mistelike fuel passing into the Bunsen tube after the first ignition of the fuel being thereby heated above'its condensation point before it is burned by the burner and after it'leavesthe carbureting means.-

6. A liquid fuel burner for cooking and other purposes, including a fuel conditioning system, which comprises a fuel and air supply, a carburetor yfor creating a mixture of fluid hydrocarbon and air, a jBunsen tube, a vvalve having arestricted jet.

outlet to inject said mixture into the Bunsen tube to supply additional air thereto, a burner to direct heat against the Wall of said Bunsen tube, for heating said mixture of hydrocarbon and air to form a gas-like condition of said mixture while `passing through the Bunsen tube and before it is burned at the outlet of said burner, means for supplying air from said fuel and air lsupply to the fuel before the same passes to the burner, atmospheric air being supplied to said Bunsen tube.

7. In an apparatus for burning liquid rhydrocarbons in vaporized condition, a liquid hydrocarbon supply, means for subjecting liquid from such supply to the action of air to highly atomize said. liquid, a Bunsen tubeV arranged to'receive the atomized liquid, a jet for supplying said atomized liquid to the Bunsen tube and spaced from the mouth of said tube so that as the liquid is supplied to the Bunsen tube a proportionately vlarger amount of air is drawn into the tube with the atomized fuel, and a burner, the jets of which are arranged so that the fuel burned at said jets 'will heat the Bunsen tube, and means for conveying the vaporized mixture of hydrocarbon and air from the Bunsen tube to the burner.

8. In a hydrocarbon burning apparatus of the class described, a Bunsen tube, ato-mining means associated with said burning apparatus for supplying a jet of hydrocarbon yfuel. in carburetted form to said Bunsen tube of the burning apparatus, means for supplying additional air to said Bunsen tube, and means associated ,with the burning apparatus for pre-heating the supply-of carburetted fuel andair in the Bunsen tube after it leaves the jet and before it reaches the said last named means. l

9. In a hydrocarbon burning apparatus of the class described, a Bunsen tube, atomizing means associated with said Bunsen tube, means for supplying liquid fuel and air to said atomizing means, means for Variably supplying atomized fuel With air from said atomizing means to said Bunsen tube, and means for preheating the mixture of atomized fuel and air in the Bunsen tube before it is burned by burning apparatus, and after it leaves the atomizing means.

10. In a hydrocarbon burning apparatus of the class described, a burner, an associated Bunsen tube adapted to be heated by the burner, an atomizing fuel jet associated with the Bunsen tube to supply fuel thereto, a liquid hydrocarbon supply, atomizing means associated With said fuel supply and fuel jet for supplying liquid hydrocarbon and air under pressure, to said jet, the `said burner being directed toward the Bunsen tube to pre-heat the atomized fuel therein before it is burned b-y the burner and after it leaves the 1l. A liquid fuel burner and fuel conditioning system which comprises a carburetor for creating a mixture of fluid hydrocarbon and air, a Bunsen tube, a nozzle to inject said mixture into the Bunsen tube to supply additional air thereto, a burner to heat said Bunsen tube, said burner being supplied by said mixture, and means for continuously supplying a carbureted mixtureto said nozzle for the continued operation of the burner.

l2. A liquid fuel burner for cooking and vother purposes, a'Bunsen tube connected thereto, a reservoir for the'supply of hydrocarbon fluid and air, power means automatically controlled for supplying said air under pressure into sai/d reservoir, a carburetor for creating a mixture of the hydrocarbon fluid with said air, meansfor conducting said mixture to theburner, 4saidburner libeaeat and said Bunsen tube being so positioned that the occurrence of a flame at said burner impinges on said Bunsen tube to convert the mixture into a gas-like condition before it enters into the burner body.

13. In a hydrocarbon fuel burning system, a source of liquid hydrocarbon fuel supply, a burner for burning said hydrocarbon, means for conducting said hydrocarbon from said source to said burner, means for admitting air undenpressure to said liquid hydrocarbon to atomize the same, means for admitting air to the atomizedv hydrocarbon to vary the ratio of air to fuel, means for applying heat to the mixture prior to its admission to the burner to vaporize the same, means for controlling the admission of the said fuel' to the burner and lto theheatingmeans, airk being further admitted to the'atomized fuel as-it passes from the control means. into `the heating means.

14. A liquid fuel burner and fuel conditioning system which comprises a carburetor for creating a mixture of fluid hydrocarbon and'air, a mixing tube, a member' having a restricted outlet for injecting said mixture into` the `mixing, tube, for

`supplying additional air thereto, means for directing heat to the Wall of the mixing tubev to transform said mixtureinto a gas-like condition, means for changing the ratio of air and said fuel as required fora combustible mixture after itis heated for the further operation of the burner, a fuel and air reservoir forming 'an enclosure, a motor, means operated by said motor for storing air in said enclosureunder pressure, the air supplied by said last named means passing continuously to the carbureting means and the mixture issuing therefrom passing tothe restricted outlet from the start to the end of the name operation.

15. A liquid fuel burner and fuel conditioning system which comprises a carburetor for creating Va mixture of fluid hydrocarbon and air, a burner having an inlet, a member having a restricted outlet for injecting said mixture into said burner inlet and for lsupplying additional air thereto, said burner heating said mixture and the additional air to transform it into a vapor While passing from said restricted outlet to the burner, and meansfor lsupplying the air which is part yof said mixture under pressure and thereby permitting said air to pass with said fuel to the burner outlet through all periods of the flame operation. C

16. In a liquid hydrocarbon burning system, a reservoir for containing` liquid hydrocarbon fuel, a burner, an atomizer, for creating a mixture of` fluidhydrocarbon and air, a member havingl a restricted outlet for conducting said mixture to said burner and for supplying additionalv air thereto to form a mixtureV of combustible ratio,

mechanicalv power means for storing air in said reservoir under pressure,.means for conducting the air and the fuel from said reservoir to said atomizer, said atomizer creating a mixture of said air and fuel under pressure, said` burner heating said mixture and the additional air to transform it into a vapor While passing from said restricted outlet to the burner, said power means acting to supply the air with the fuel to the restricted outlet through all periods of the flame operation.

17. A liquid fuel burner and fuel conditioning system, which comprises a carburetor for creating a mixture of fluid hydrocarbon and air, a mixing tube, a member having a restricted outlet to inject said mixture into the mixing tube and to aspirate additional. air into said mixture, a

burner to direct heat against the Wall of `said mixing tube to transform said mixture; and-the additional air into a wgas-like condition While passing to the burner and means for continuouslyr supplying Aunder pressure the air which forms part of said mixture. v

18. A liquid fuel burner and fuel conditioning system comprising a main fuel 'and airV reservoir for any desired capacity and suitable vto, belocated outside of a building, an auxiliary fuel and,v

air reservoir suitable to be located insideof a building, means for conducting fuel out from-said main reservoir and to said auxiliary reservoir, means operated by power automatically controlled for directing air into said main reservoir and into said auxiliary reservoir under pressure, means for creating a mist-like mixture of -said fuel and air for starting a flame, means ineluding said fuel burner for transforming said mistlike mixture into a vaporous mixture for further operation of the flame, said means for creating the mist-like mixture constantly supplying said mixture to the burner and said means for directing air constantly maintaining a pre-determined average amount of the air pressure through all time of the name operation.

19. A liquid fuel burner and fuel conditioning system comprising a liquid fuel and air reservoir for any desired capacity and suitable to be located outside of a building, a carburetor suitable to be located inside of a building, means for conducting fuel out from said reservoir and to said carburetor, means operated by power automatically controlled for directing air into said reservoir and to said carburetor, said air being under pressure for creating a carbureted mixture of the fuel and air, means for transforming said carbureted mixture and additional air into a vaporous mixture and means for continuously conducting said vaporous mixture to the burner for supplying a ame through all time of the flame operation.

20. A liquid fuel burner and fuel conditioning system comprising a burner, a main fuel and air supply apparatus, an auxiliary fuel and air supply apparatus, said auxiliary supply apparatus being isolated from said main supply apparatus, means for forcing air into said main supply apparatus and thence into said auxiliary supply apparatus under pressure, means for conducting fuel out from said main supply apparatus and to said auxiliary supply apparatus, a carburetor for creating a mixture of said fuel and air, a Bunsen tube, meansfor injecting said mixture into said Bunsen tube for supplying said burner, said burner directing a flame against the Wall of the Bunsen tube to heat the further supply of said mixture for transforming it into a vaporous mixture for further operation of the burner.

21. A liquid fuel burner and fuel conditioning system comprising means for creating a carbureted mixture of fluid hydro-carbon and air, a conducting means having an air inlet for supplying additional air to said mixture, said conducting means carrying said mixture and additional air to the burner to permit starting of the same, said burner including means for directing a name to said conducting means for heating the further supply of the carbureted mixture and additional air therewith to transform it into a Vaporous condition While passing to the burner, said conducting means being so positioned relative to said flame as to become heated more rapidly than the burner body following ignition ol' said mixture, said means for creating a carbureted mixture continuously supplying said'mixtu-re t0, the inletof said conducting means Vfor continu-K ously supplying fuel to said burner through all time-of the burner operation. f

22. A liquid fuel burner and fuel conditioning system comprising means for creating-a carbureted -mixture of fluid hydro-carbon and air, of combustible ratio to permit starting of a flame,l said burner heating the further supply of said mixture to transform it into a vaporous condition While passing to the burner and means for changing the air and fuel ratio as required for perfectl combustion, means operated by power automatically controlledV for supplying the air under pressure which is part of said mixture and for maintaining a pre-determined average amount of the air pressure through all periods of the flame operation.

23. A liquid fuel burner and fuel conditioning system comprising means for creating a mistlike mixture of fluid hydro-carbon and air, a mixing tube for conducting said mixture to the burner to permit starting of a flame, said burner impinging the flame against the wall of said mixing tube for supplying heat to transform said mixture intoy a vaporous condition for further operation of the flame, and means for continuously directing said mist-like mixtureinto said mixing tube for continuously supplying fuel to said burner through all time of the flame operation, means for supplying the air under pressure Which forms part of said mixture and for maintaining a pre-determined average amount of the air pressure through all time of the flame operation.

24. A liquid fuel burner and fuel conditioning system comprising means for creating a carbureted mixture of fluid hydrocarbon and air, a Bunsen tube for conducting said mixture and additional air to the burner to permit starting of the same, said burner including means for directing a flame against the wall of the Bunsen tube to apply heat for transforming said carbureted mixture and additional air into a vaporous mix-l ture While passing to the burner, said means for creating a carbureted mixture continuously supplying such carbureted mixture into the Bunsen tube inlet through all time of the ame operation, means for supplying the air under pressure which forms part of said mixture and for maintaining a pre-determined average amount of the air pressure through all periods of the flame operation.

25. A liquid fuel burner and fuel conditioning system comprising a liquid fuel and air reservoir, a carburetor for creating a mixture of said fuel with air under pressure, a Bunsen tube in communication with said burner, means to inject said mixture into theBunsen tube and to carry additional air therewith for supplying a ame, said burner directing a name against the Wall of the Bunsen tube to heat the carbureted fuel and additional air therewith to transform it into a vaporous mixture for further operation of the flame, means for maintaining an average amount of the air pressure through all periods of the flame operation.

26. A liquid fuel burner and fuel conditioning system comprising means for creating a carbureted mixture of fluidhydro-carbon with airvr of a ratio to permitstarting of a name, a Bunsen tube for conducting said mixture to the burner, said burner directing a flame against the Wall of the Bunsen tube for heating the mixture to transform it into a vaporous condition and means for changing the air ratio with said fuel as required' after the fuel with air has been heated, means for supplying under pressure the air which forms part of saidkmixture, said air passing with the fuel continuously to the burner through all periods of the flame operation.

27. A liquidfuel burner and fuel conditioning system comprising a. means for creating a carbureted mixture of fluid hydro-carbon and'air under inclosure and under pressure, means including said burner for transforming said carbureted mixture into a vaporous mixture and means for conducting said vaporous mixture to the burner for supplying a flame, means for supplying under pressure the air which forms part of'said carburetedfmixture and for ymaintaining a predetermined averagev amount'of the air pressure through all periods of the flame operation.

28. A liquid fuel burner and fuel conditioning system comprising means .for kcreating armistlike mixture of fluid hydro-carbon and air, means for constantly transforming said mist-like mixture into a vaporous mixture, means for conduct'-Y lingvsaidv'aporous mixture to the burner, means for supplyingunder pressure through all time rof v 

